ARZI Spark create a low resistance zone near the electrode to ensure its constant output. This is an innovative, eco friendly and precisely developed material that eliminates the utilization of salt and charcoal.Backfill Grounding Compound is a non corrosive material with the capablity to absorb and retain the moisture content from the surroundings. It is non soluble in water, hence it just sticks to one place without washing out by the water of rain and underground.